XK and influenza: To map influenza A (H1N1) T-cell epitopes in Pandemrix-associated NT1, 15-mer peptides covering hemagglutinin (HA), NA, and NP of influenza (A/reassortant/NYMC X-179A (California/07/2009 × NYMC X-157)(H1N1)) vaccine virus with 12 amino acid overlap were produced.